Display Panel and Manufacturing Method Therefor, and Display Device

The present disclosure is a U.S. National Stage of International Application No. PCT/CN2023/108436 filed on Jul. 20, 2023, which claims priority to Chinese patent application No. 202210871509.8 filed on Jul. 22, 2022 and entitled “Display panel, manufacturing method therefor, and display device”, the disclosure of both are incorporated herein by reference in their entireties.

The present disclosure relates to the field of display technology, and in particular to a display panel and a manufacturing method therefor, and a display device.

Flexible Multi-Layer On Cell (FMLOC) design is currently mainstream in the field of OLED touch display. FMLOC design refers to manufacturing a metal electrode layer on the encapsulation layer of the display substrate, where the surface of the metal electrode layer significantly reflects ambient light.

In order to reduce ambient light reflection and improve contrast, a black matrix is introduced to absorb light in non-pixel areas. Due to differences in shape and size of different sub-pixels, the black matrix has different effects on the luminance of light of different colors, causing color deviation in the display panel.

It should be noted that the information disclosed in the above Background section is only used to enhance understanding of the background of the present disclosure, and therefore may include information that does not constitute prior art known to those of ordinary skills in the art.

The present disclosure provides a display panel and a manufacturing method therefor, and a display device.

According to an aspect of the present disclosure, a display panel is provided, including a driving backplane, a pixel layer, an encapsulation layer, and an optical path regulation layer. The pixel layer includes a pixel definition layer and a plurality of sub-pixels of different colors. The pixel definition layer is located on a side of the driving backplane. The pixel definition layer is provided with a plurality of pixel openings. The plurality of sub-pixels is respectively located in different pixel openings. The encapsulation layer is located on a side of the pixel layer away from the driving backplane. The optical path regulation layer is located on a side of the encapsulation layer away from the driving backplane. The optical path regulation layer includes a plurality of first refractive units. The angle between the side surface and the bottom surface of the first refractive unit is greater than or less than 90 degrees. A second refractive unit is arranged between two adjacent first refractive units. The orthographic projection of the first refractive unit or the second refractive unit on the driving backplane covers the orthographic projection of at least one sub-pixel on the driving backplane. The refractive index of the second refractive unit is greater than the refractive index of the first refractive unit. After the exit light of the sub-pixel passes through the interface between the side surface of the first refractive unit and the side surface of the second refractive unit, the exit angle of the exit light becomes larger or smaller.

In an embodiment of the present disclosure, the display panel further includes a color filter layer. The color filter layer is located on a side of the encapsulation layer away from the driving backplane. The light path regulation layer is located on a side of the color filter layer away from and/or close to the driving backplane. The color filter layer includes filter units of different colors and a black matrix located at a periphery of the filter unit. The orthographic projection of the filter unit of a color on the driving backplane covers the orthographic projection of the first refractive unit or the second refractive unit corresponding to the sub-pixel of the same color on the driving backplane.

In an embodiment of the present disclosure, the light path regulation layer includes a first light path regulation layer. The first light path regulation layer is located on a side of the color filter layer close to the driving backplane. The orthographic projection of the second refractive unit of the first light path regulation layer on the driving backplane covers the orthographic projection of at least one sub-pixel on the driving backplane. The angle between the side surface and the bottom surface of the first refractive unit of the first light path regulation layer is less than 90 degrees.

In an embodiment of the present disclosure, the optical path regulation layer includes a first optical path regulation layer. The first optical path regulation layer is located on a side of the color filter layer close to the driving backplane. The orthographic projection of the second refractive unit of the first optical path regulation layer on the driving backplane covers the orthographic projection of at least one sub-pixel on the driving backplane. The angle between the side surface and the bottom surface of the first refractive unit of the first optical path regulation layer is greater than 90 degrees.

In an embodiment of the present disclosure, the optical path regulation layer includes a second optical path regulation layer. The second optical path regulation layer is located on a side of the color filter layer away from the driving backplane. The orthographic projection of the second refractive unit of the second optical path regulation layer on the driving backplane covers the orthographic projection of at least one sub-pixel on the driving backplane. The angle between the side surface and the bottom surface of the first refractive unit of the second optical path regulation layer is less than 90 degrees.

In an embodiment of the present disclosure, the optical path regulation layer includes a second optical path regulation layer. The second optical path regulation layer is located on a side of the color filter layer away from the driving backplane. The orthographic projection of the second refractive unit of the second optical path regulation layer on the driving backplane covers the orthographic projection of at least one sub-pixel on the driving backplane. The angle between the side surface and the bottom surface of the first refractive unit of the second optical path regulation layer is greater than 90 degrees. The angle between the exit light and the normal line of the side surface of the first refractive unit of the second optical path regulation layer is less than 40 degrees.

In an embodiment of the present disclosure, the optical path regulation layer includes a second optical path regulation layer. The second optical path regulation layer is located on a side of the color filter layer away from the driving backplane. The orthographic projection of the second refractive unit of the second optical path regulation layer on the driving backplane covers the orthographic projection of at least one sub-pixel on the driving backplane. The angle between the side surface and the bottom surface of the first refractive unit of the second optical path regulation layer is greater than 90 degrees. The angle between the exit light and the normal line of the side surface of the first refractive unit of the second optical path regulation layer is greater than 40 degrees and less than 90 degrees.

In an embodiment of the present disclosure, the optical path regulation layer includes a second optical path regulation layer. The second optical path regulation layer is located on a side of the color filter layer away from the driving backplane. The orthographic projection of the first refractive unit of the second optical path regulation layer on the driving backplane covers the orthographic projection of at least one sub-pixel on the driving backplane. The angle between the side surface and the bottom surface of the first refractive unit of the second optical path regulation layer is less than 90 degrees.

In an embodiment of the present disclosure, the first optical path regulation layer is a touch layer. The touch layer includes a plurality of touch groups, and the plurality of touch groups is respectively wrapped in the plurality of first refractive units.

In an embodiment of the present disclosure, the distance between the edge of the orthographic projection of the touch group on the driving backplane and the edge of the orthographic projection of the first refractive unit on the driving backplane is greater than 2 microns.

In an embodiment of the present disclosure, the distance between the edge of the orthographic projection on the driving backplane of the side with a smaller width of the second refractive unit and the edge of the orthographic projection on the driving backplane of the side away from the driving backplane of the sub-pixel is greater than 5 microns.

In an embodiment of the present disclosure, the refractive index of the first refractive unit is 1.3-1.5, and the refractive index of the second refractive unit is 1.7-1.9.

In an embodiment of the present disclosure, the material of the first refractive unit is positive photoresist or negative photoresist.

In an embodiment of the present disclosure, the thickness of the second refractive unit is greater than the thickness of the first refractive unit, the sides of the second refractive units close to the driving backplane are located on the same plane, the side of the second refractive unit away from the driving backplane is higher than the first refractive unit, and two adjacent second refractive units are connected and cover the side of the first refractive unit away from the driving backplane.

In an embodiment of the present disclosure, the thickness of the first refractive unit is 2-3 microns, and the thickness of the second refractive unit is 3-5 microns.

In an embodiment of the present disclosure, the touch layer includes a first touch layer and a second touch layer. The first passivation layer is provided on a side of the first touch layer away from the driving backplane. The second passivation layer is provided on a side of the second touch layer away from the driving backplane. The first touch layer includes a first touch part, the second touch layer includes a second touch part, and the first touch part and the second touch part constitute the touch group.

According to another aspect of the present disclosure, a display device is provided, including a display panel according to an aspect of the present disclosure.

forming a pixel layer on a side of the driving backplane, where the pixel layer includes a pixel definition layer and a plurality of sub-pixels, the pixel definition layer is provided with a plurality of pixel openings, and the plurality of sub-pixels is respectively provided in different pixel openings; forming an encapsulation layer on a side of the pixel layer away from the driving backplane; and forming a first refractive layer on a side of the encapsulation layer away from the driving backplane, patterning the first refractive layer to form a plurality of first refractive units, and filling a second refractive layer between two adjacent first refractive units to form a plurality of second refractive units, where the orthographic projection of the first refractive unit or the second refractive unit on the driving backplane covers the orthographic projection of at least one sub-pixel on the driving backplane. According to another aspect of the present disclosure, a method for manufacturing a display panel is provided, the manufacturing method comprising: providing a driving backplane;

In an embodiment of the present disclosure, the first refractive layer is positive photoresist, and patterning the first refractive layer to form the plurality of first refractive units includes: exposing and developing the area of the first refractive layer directly facing the sub-pixel to form the plurality of first refractive units, where the angle between the side surface and the bottom surface of the first refractive unit is less than 90 degrees.

In an embodiment of the present disclosure, the first refractive layer is negative photoresist, and patterning the first refractive layer to form the plurality of first refractive units includes: exposing and developing the area of the first refractive layer directly facing the pixel definition layer at a periphery of the sub-pixel to form the plurality of first refractive units, where the angle between the side surface and the bottom surface of the first refractive unit is greater than 90 degrees.

It should be understood that the above general description and the detailed description below are only examples and explanatory, and cannot limit the present disclosure.

In the drawings:

10 11 12 13 131 132 133 134 135 1361 1362 137 1381 14 141 142 20 201 2011 202 2021 2022 2023 2024 2025 2026 30 31 32 33 40 41 42 401 402 50 51 511 512 513 52 60 61 611 612 62 621 622 623 63 64 65 66 67 —driving backplane,—base substrate,—first buffer layer;—driving circuit layer,—active layer,—gate insulation layer,—gate,—interlayer insulation layer,—interlayer dielectric layer,—first source,—drain,—protective layer,—second source;—planarization layer group,—first planarization layer,—second planarization layer;—pixel layer,—pixel definition layer,—pixel opening,—sub-pixel,—pixel electrode,—light-emitting layer,—common electrode,—red sub-pixel,—green sub-pixel,—blue sub-pixel;—encapsulation layer,—first inorganic encapsulation layer,—organic encapsulation layer,—second inorganic encapsulation layer;—light path regulation layer,—first light path regulation layer,—second light path regulation layer,—first refractive unit,—second refractive unit,—color filter layer,—filter unit,—red filter unit,—green filter unit,—blue filter unit,—black matrix;—touch layer,—first touch layer,—first touch part,—bridge part,—second touch layer,—second touch part,—touch driving metal grid,—touch sensing metal grid,—first passivation layer,—second passivation layer,—second buffer layer,—touch group,—driving lead.

Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in a variety of forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided, so that the present disclosure will be comprehensive and complete, and the concepts of the example embodiments will be fully conveyed to those skilled in the art. The same reference numerals in the drawings represent the same or similar structures, and their detailed descriptions will be omitted. In addition, the drawings are only schematic illustrations of the present disclosure and are not necessarily drawn to scale.

Although relative terms such as “upper” and “lower” are used in the specification to describe the relationship of one component represented by an icon relative to another component, these terms are used in the specification only for convenience, such as according to the example direction described in the drawings. It is understood that if the device represented by the icon is flipped so that it is upside down, the component described as “upper” will become the component “lower”. When a structure is “on” another structure, it may mean that a structure is formed integrally on the other structure, or that a structure is “directly” set on the other structure, or that a structure is “indirectly” set on the other structure through an intermediate structure.

The terms “one”, “an”, “the”, “said” and “at least one” are used to indicate the presence of one or more elements or components, etc. The terms “including” and “having” are used to indicate an open-ended inclusion, and mean that there may be other elements or components, etc. in addition to the listed elements or components, etc. The terms “first”, “second” and “third” are used only as markers and are not limiting the number of the relevant objects.

The Active Matrix Organic Light Emitting Devices (AMOLED) have the advantages of low power consumption and flexible display. A flexible multilayer structure (also called as Functional Metal Layer On Cell, FMLOC) may be directly formed on the display panel. That is, a metal electrode layer is made on the encapsulation layer of the display panel for touch purpose. The flexible multilayer structure can reduce the thickness of the screen, which is conducive to folding. At the same time, there is no fitting tolerance, which can reduce the frame width. FMLOC contains two metal layers, and the surface of the metal electrode layer reflects ambient light significantly. In order to reduce the reflection of ambient light on the surface of the metal electrode layer and improve the contrast of the displayed image, a color filter layer (also called as Color filter On Encapsulation, COE) is provided on the side of the flexible multilayer structure away from the display substrate.

1 FIG. 10 20 10 20 20 10 10 50 10 is a cross-sectional view of an OLED display panel integrating FMLOC and COE in the related art. The display panel includes a driving backplane(also called as backing plate, BP). A pixel layeris provided on the driving side of the driving backplane. The pixel layerincludes a pixel definition layer (PDL) provided with pixel openings. OLED light-emitting devices of different colors are provided in the pixel openings. A thin film encapsulation layer (TFE) is provided on the side of the pixel layeraway from the driving backplane. A flexible multilayer structure (also called as Functional Metal Layer On Cell, FMLOC,) is provided on the side of the thin film encapsulation layer away from the driving backplane. A color filter layer(also called as Color filter On Encapsulation, COE) is provided on the side of the flexible multilayer structure away from the driving backplane.

2 FIG. 3 FIG. 60 60 60 61 62 63 61 11 64 62 11 65 61 As shown inand, the flexible multilayer structure generally refers to a touch layer, and the touch layermay be a mutual capacitance touch. The touch layerincludes a first touch layerand a second touch layer. The first passivation layeris provided on the side of the first touch layeraway from the base substrate. The second passivation layeris provided on the side of the second touch layeraway from the base substrate. The second buffer layermay also be provided between the encapsulation layer and the first touch layer.

62 61 62 61 The second touch layermay be a Metal Mesh (MM). The first touch layermay be a Bridge Metal layer (BM). The second touch layermay also be a Bridge Metal layer (BM). The first touch layermay be a Metal Mesh layer (MM).

62 61 62 622 623 623 622 612 61 622 623 612 61 622 623 67 The following description assumes that the second touch layeris a Metal Mesh layer (MM) and the first touch layeris a Bridge Metal layer (BM). The second touch layermay be divided into touch driving metal gridsand touch sensing metal gridsin the horizontal and vertical directions. The touch sensing metal gridsare connected to each other, and the touch driving metal gridsare connected through the bridge partof the first touch layer. Alternatively, the touch driving metal gridsare connected to each other, and the touch sensing metal gridsare connected through the bridge partof the first touch layer. The touch driving metal gridslocated in the same row, and respectively the touch sensing metal gridslocated in the same column, are connected to the driving IC through the driving lead.

63 64 It should be noted that the thickness of the buffer layer is usually 0.3˜1 micron, the thickness of the first passivation layeris usually 0.3˜1 micron, and the thickness of the second passivation layeris usually 2˜3 microns. The materials of the buffer layer, the first passivation layer, and the second passivation layer may all be polyimide (PI).

62 10 61 62 The second touch layermay be composed of a first titanium metal layer, an aluminum metal layer, and a second titanium metal layer arranged in sequence in a direction away from the driving backplane. The thickness of the first titanium metal layer may be 0.03 microns, the thickness of the aluminum metal layer may be 0.3 microns, and the thickness of the first titanium metal layer may be 0.03 microns. The layer structure and thickness of each layer of the first touch layerand the second touch layermay be the same, so they are not repeated.

50 51 51 10 402 10 50 10 51 52 51 The color filter layerincludes a filter unitarranged in the pixel area and a black matrix (BM) arranged in the non-pixel area. The orthographic projection of the filter unitof a color on the driving backplanecovers the orthographic projection of the second refractive unitcorresponding to the sub-pixel of the same color on the driving backplane. A protective layer may also be arranged on the side of the color filter layeraway from the driving backplane. The protective layer covers the filter unitand the black matrix. The thickness of the black matrixis usually 1.3 microns, the thickness of the filter unitis usually 3 microns, and the thickness of the protective layer is usually 2˜3 microns.

The black matrix will cause the luminance decay (L-Decay) of the exit light of the sub-pixel to increase with the increase of the viewing angle. Due to the difference in shape and size of RGB sub-pixels of different colors, the degrees of aggravation of the luminance decay caused by the black matrix of the RGB sub-pixels of different colors at different viewing angles are usually inconsistent, resulting in a mismatch in the luminance decay of the RGB sub-pixels of different colors at different viewing angles, and the color deviation of the displayed image at the white light viewing angle.

In the related art, one regulation method is to control the microcavity length and/or cathode reflectivity of the OLED device; and another regulation method is to choose the opening size of the black matrix around the sub-pixels of different colors in a differentiated manner. The above two regulation methods are usually used to control the luminance decay of the monochromatic light at full viewing angle, and cannot control the luminance decay of the monochromatic light in a specific angle range. When it is necessary to optimize the color deviation trajectory and color deviation value of white light in a specific viewing angle range (such as a small viewing angle or a large viewing angle), the color deviation of white light in other viewing angle ranges is often degraded.

The following is an explanation of the other regulation method. When the opening size of the black matrix is ≥4 microns, the aggravation of the luminance decay at a small viewing angle is significantly reduced. But, in order to reduce the reflectivity, the opening size of the black matrix is usually controlled at 1.5˜3 microns, which will still significantly accelerate the luminance decay at a small viewing angle.

4 28 FIGS.to 10 20 50 40 20 10 20 10 50 10 50 51 52 51 51 10 10 40 10 40 401 401 402 401 401 402 10 402 401 401 402 In view of above, an embodiment of the present disclosure provides a display panel. As shown in, the display panel includes a driving backplane, a pixel layer, an encapsulation layer, a color filter layer, and an optical path regulation layer. The pixel layerincludes a pixel definition layer and a plurality of sub-pixels of different colors. The pixel definition layer is located on a side of the driving backplane. The pixel definition layer is provided with a plurality of pixel openings. The plurality of sub-pixels is respectively located in different pixel openings. The encapsulation layer is located on the side of the pixel layeraway from the driving backplane. The color filter layeris located on the side of the encapsulation layer away from the driving backplane. The color filter layerincludes filter unitsof different colors and a black matrixlocated at the periphery of the filter unit. The orthographic projection of the filter unitof a color on the driving backplanecovers the orthographic projection of the sub-pixel of the same color on the driving backplane. The light path regulation layeris located on the side of the encapsulation layer away from the driving backplane. The light path regulation layerincludes a plurality of first refractive units. The angle between the side surface and the bottom surface of the first refractive unitis greater than or less than 90 degrees. The second refractive unitis arranged between two adjacent first refractive units. The orthographic projection of the first refractive unitor the second refractive uniton the driving backplanecovers the orthographic projection of at least one sub-pixel on the base substrate. The refractive index of the second refractive unitis greater than the refractive index of the first refractive unit. After the exit light of the sub-pixel passes through the interface between the side surface of the first refractive unitand the side surface of the second refractive unit, the exit angle of the exit light becomes larger or smaller.

40 10 40 401 402 402 401 401 402 10 401 402 The optical path regulation layeris provided on the side of the encapsulation layer of the display panel away from the driving backplane. The optical path regulation layerincludes a first refractive unitand a second refractive unit. The refractive index of the second refractive unitis greater than the refractive index of the first refractive unit. The orthographic projection of the first refractive unitor the second refractive uniton the driving backplanecovers the orthographic projection of at least one sub-pixel on the base substrate. After the exit light of the sub-pixel passes through the interface between the side surface of the first refractive unitand the side surface of the second refractive unit, the exit angle of the exit light becomes larger or smaller. Thereby, the luminance decay of a certain monochromatic light is accelerated or slowed down, thereby improving the color deviation of the display panel.

401 402 It should be noted that the refractive index of the first refractive unitis generally 1.3-1.5, and the refractive index of the second refractive unitis generally 1.7-1.8.

40 402 401 10 402 402 401 401 402 402 10 402 10 401 From the perspective of the structural strength of the optical path regulation layerand the manufacturing process therefor, two adjacent second refractive unitsmay be connected to cover the side of the first refractive unitaway from the driving backplane. When forming the second refractive unit, it is sufficient to directly fill up between two adjacent refractive units. Therefore, the thickness of the second refractive unitis greater than that of the first refractive unit. Specifically, the thickness of the first refractive unitmay be 2-3 microns, and the thickness of the second refractive unitmay be 3-5 microns. The sides of the second refractive unitsclose to the driving backplaneare located on the same plane. The height of the side of the second refractive unitaway from the driving backplaneis higher than that of the first refractive unit.

401 401 401 401 401 401 401 The material of the first refractive unitis positive photoresist or negative photoresist. When the material of the first refractive unitis positive photoresist, the exposure area is an area of the first refractive layer directly facing the sub-pixel, and the residue increases with the increase of etching depth during the development and patterning process, so that the cross section of the first refractive unitis a positive trapezoid. That is, the angle between the side surface and the bottom surface of the first refractive unitis less than 90 degrees. When the material of the first refractive unitis negative photoresist, the exposure area is an area of the first refractive layer directly facing the pixel definition layer at the periphery of the sub-pixel. As the etching depth increases during the development process, the loss of the film layer to be retained increases, resulting in the cross-section of the first refractive unitbeing an inverted trapezoid. That is, the angle between the side surface and the bottom surface of the first refractive unitis greater than 90 degrees.

4 FIG. 401 402 401 402 401 1 401 2 1 As shown in, when the angle between the side surface and the bottom surface of the first refractive unitis less than 90 degrees, and the light emitted by the sub-pixel passes through the second refractive unitand reaches the side surface of the first refractive unit, total reflection will occur at the interface between the second refractive unitand the first refractive unitif the incident angle θis greater than the critical angle. This is because the angle between the normal line of the side surface of the first refractive unitand the horizontal direction is positive, and the exit angle θof the exit light is greater than the incident angle θ. Thus, the converging effect of the exit light will be generated, thereby accelerating the luminance decay of the light emitted by the corresponding sub-pixel.

5 FIG. 401 402 401 402 401 1 401 2 1 As shown in, when the angle between the side surface and bottom surface of the first refractive unitis less than 90 degrees, and the light emitted by the sub-pixel passes through the second refractive unitand reaches the side surface of the first refractive unit, total reflection will also occur at the interface between the second refractive unitand the first refractive unitif the incident angle θis greater than the critical angle. This is because the angle between the normal line of the side surface of the first refractive unitand the horizontal direction is negative, the exit angle θof the exit light is less than the incident angle θ. Thus, the diverging effect of the exit light will be generated, thereby slowing down the luminance decay of the light emitted by the corresponding sub-pixel.

6 FIG. 7 FIG. 50 10 50 10 50 10 50 51 52 51 51 10 401 402 10 As shown inand, the display panel also includes a color filter layer, which is arranged on the side of the encapsulation layer away from the driving backplane. The optical path regulation layer may be arranged on the side of the color filter layerclose to the driving backplane, or on the side of the color filter layeraway from the driving backplane. The color filter layermay include filter unitsof different colors and a black matrixdisposed at the periphery of the filter unit. The orthographic projection of the filter unitof a color on the driving backplanecovers the orthographic projection of the first refractive unitor the second refractive unitcorresponding to the sub-pixel of the same color on the driving backplane.

6 FIG. 41 50 10 402 41 10 401 41 51 As shown in, the optical path regulation layer includes a first optical path regulation layer, which is disposed on the side of the color filter layerclose to the driving backplane. The orthographic projection of the second refractive unitof the first optical path regulation layeron the driving backplanecovers the orthographic projection of at least one sub-pixel on the base substrate. The angle between the side surface and the bottom surface of the first refractive unitis less than 90 degrees. After the exit light of the corresponding sub-pixel converges through the first optical path regulation layer, it is emitted from the filter unitof the same color. The luminance decay of a certain monochromatic light at full viewing angle can be accelerated.

7 FIG. 41 50 10 402 41 10 401 41 41 51 As shown in, the optical path regulation layer includes a first optical path regulation layer, which is disposed on the side of the color filter layerclose to the driving backplane. The orthographic projection of the second refractive unitof the first optical path regulation layeron the driving backplanecovers the orthographic projection of at least one sub-pixel on the base substrate. The angle between the side surface and bottom surface of the first refractive unitof the first optical path regulation layeris greater than 90 degrees. The light emitted by the corresponding sub-pixel is diverged through the first optical path regulation layerand then emitted from the filter unitof the same color. The luminance decay of a certain monochromatic light at full viewing angle can be slowed down.

41 611 621 611 621 66 66 401 66 401 The first optical path regulation layeris a touch layer. The first touch layer and the second touch layer of the touch layer are usually arranged in the non-pixel area. The first touch layer includes a first touch part, and the second touch layer includes a second touch part. The first touch partand the second touch partbetween two adjacent sub-pixels are defined as the touch group. The first passivation layer and the second passivation layer between two adjacent touch groupsare patterned to form a plurality of first refractive units. The plurality of touch groupsis respectively wrapped in the plurality of first refractive units.

The first optical path regulation layer is set by using an existing film layer, which reduces the increase in thickness of the display panel while realizing the luminance regulation of the display panel. It should be noted that in other feasible implementations, the first optical path regulation layer may also be set separately.

66 401 66 10 401 10 401 The width of the touch groupis usually 3 microns. Considering the accuracy of the etching process, the width of the first refractive unitis usually greater than or equal to 7 microns. Specifically, the distance between the edge of the orthographic projection of the touch groupon the driving backplaneand the edge of the orthographic projection of the first refractive uniton the driving backplaneis greater than 2 microns. The refraction effect of the first refractive unitcan be ensured without affecting the touch function of the touch layer.

402 402 402 10 10 402 The spacing between adjacent sub-pixels is usually 18-23 microns, so that the side with a smaller width of the second refractive unitcan be expanded by more than 10 microns than the light-emitting area of the sub-pixel. Generally, the center line of the sub-pixel is coinciding with the center line of the second refractive unit. Therefore, it is usually that the distance between the edge of the orthographic projection on the driving backplane of the side with a smaller width of the second refractive unitand the edge of the orthographic projection on the driving backplaneof the side away from the driving backplaneof the sub-pixel is greater than 5 microns. This effectively ensures that the exit light of the sub-pixel area is incident into the second refractive unitfirst.

8 FIG. 6 FIG. 42 50 10 42 41 2 42 41 42 As shown in, on the basis of, a second optical path regulation layermay be further provided on the side of the color filter layeraway from the driving backplane. Because the second optical path regulation layeris moved upward relative to the first optical path regulation layer, and the vertical distance dfrom the sub-pixel is farther, the viewing angle required for the same point of the sub-pixel to reach the regulation interface of the second optical path regulation layeris significantly reduced. Therefore, the first optical path regulation layerwill accelerate the luminance decay at the full viewing angle) (0˜80°, while the regulation viewing angle of the second optical path regulation layerwill be reduced, which can accelerate the luminance decay at a small viewing angle.

402 42 2 42 42 42 42 41 42 41 41 42 41 41 42 9 FIG. The size of the second refractive unitof the second optical path regulation layermay be adjusted, or the vertical distance dbetween the second optical path regulation layerand the sub-pixel may be adjusted, and the horizontal distance dl between the second optical path regulation layerand the sub-pixel may also be adjusted, so as to further reduce the regulation viewing angle of the second optical path regulation layer, so that the second optical path regulation layeronly regulates the luminance decay in a specific small viewing angle range. As shown in, the solid line is the curve of luminance variation with viewing angle when the first optical path regulation layerand the second optical path regulation layerare not provided; the dashed line is the curve of luminance variation with viewing angle when only the first optical path regulation layeris provided; and the dotted line is the curve of luminance variation with viewing angle when both the first optical path regulation layerand the second optical path regulation layerare provided. It can be seen that when only the first optical path regulation layeris provided, the display luminance decays at full viewing angle; and when the first optical path regulation layerand the second optical path regulation layerare both provided, the display luminance decays at full viewing angle, and decays fastest in 15°-25°.

10 FIG. 42 50 10 402 42 10 401 42 41 42 2 1 401 2 42 As shown in, the second optical path regulation layermay also be provided on the side of the color filter layeraway from the driving backplane. The orthographic projection of the second refractive unitof the second optical path regulation layeron the driving backplanecovers the orthographic projection of at least one sub-pixel on the base substrate. The angle between the side surface and bottom surface of the first refractive unitof the second optical path regulation layeris less than 90 degrees. Compared with the first light path regulation layer, the second light path regulation layeris at a farther vertical distance dfrom the sub-pixel, and the incident angle θis greater than the critical angle. Therefore, the exit light of the sub-pixel will undergo total reflection when being incident onto the side surface of the first refractive unit, so that the exit angle θof the exit light becomes smaller, and the viewing angle required for the same sub-pixel to reach the side surface of the second light path regulation layeris significantly reduced. Thereby, the luminance decay of a certain monochromatic light at a small viewing angle is accelerated.

11 FIG. 10 FIG. 401 42 401 42 401 1 401 2 As shown in, the difference fromis that the angle between the side surface and the bottom surface of the first refractive unitof the second optical path regulation layeris greater than 90 degrees, and the angle between the exit light and the normal line of the side surface of the first refractive unitof the second optical path regulation layeris less than 40 degrees. Although the angle between the normal line of the side surface of the first refractive unitand the horizontal direction is negative, the incident angle θis less than the critical angle. Thus, the exit light of the sub-pixel will be refracted when being incident onto the side surface of the first refractive unit, so that the exit angle θof the exit light becomes smaller. Therefore, the converging effect of the exit light is still produced, which can accelerate the luminance decay of a certain monochromatic light at a small viewing angle.

12 FIG. 10 FIG. 11 FIG. 42 42 In, the solid line is the curve of luminance change with viewing angle when the second optical path regulation layeris not provided. The dotted line is the curve of luminance change with viewing angle when the second optical path regulation layerinandis arranged. It can be seen that the luminance decay at a small viewing angle is indeed accelerated.

13 FIG. 11 FIG. 401 42 40 401 1 401 402 2 As shown in, the difference fromis that the angle between the exit light and the normal line of the side surface of the first refractive unitof the second optical path regulation layeris greater thandegrees and less than 90 degrees. The angle between the normal line of the side surface of the first refractive unitand the horizontal direction is negative, and the incident angle θof the exit light is greater than the critical angle. Therefore, when the exit light of the sub-pixel is incident onto the side surface of the first refractive unitfrom the second refractive unit, total reflection occurs, so that the exit angle θof the exit light becomes larger, resulting in the diverging effect of the exit light. This can slow down the luminance decay of a certain monochromatic light at a small viewing angle.

14 FIG. 13 FIG. 401 42 10 401 42 1 401 402 2 As shown in, the difference fromis that the orthographic projection of the first refractive unitof the second optical path regulation layeron the driving backplanecovers the orthographic projection of at least one sub-pixel on the base substrate, and the angle between the side surface and the bottom surface of the first refractive unitof the second optical path regulation layeris less than 90 degrees. The incident angle θof the exit light is less than the critical angle. When the exit light is incident onto the side surface of the first refractive unitfrom the second refractive unit, it will be refracted, so that the exit angle θof the exit light becomes larger, and the diverging effect of the exit light is produced. This can slow down the luminance decay of a certain monochromatic light at a small viewing angle.

15 FIG. 13 FIG. 14 FIG. 42 42 In, the solid line is the curve of luminance variation with viewing angle when the second optical path regulation layeris not provided. The dotted line is the curve of luminance variation with viewing angle when the second optical path regulation layerinandis arranged. It can be seen that the luminance decay at the small viewing angle is indeed slowed down.

16 FIG. 7 FIG. 7 FIG. 10 FIG. 10 FIG. 41 42 41 50 10 41 41 41 42 50 10 42 42 42 As shown in, the optical path regulation layer may include a first optical path regulation layerand a second optical path regulation layer. The first optical path regulation layeris arranged on the side of the color filter layerclose to the driving backplane. The first optical path regulation layeradopts the structure of the first optical path regulation layershown in. The structure of the first optical path regulation layerinhas been described in detail before, so it will not be repeated. The second optical path regulation layeris arranged on the side of the color filter layeraway from the driving backplane. The second optical path regulation layeradopts the structure of the second optical path regulation layershown in. The structure of the second optical path regulation layerinhas been described in detail above, so it will not be described again.

1 401 41 401 41 2 3 401 42 401 41 4 The incident angle θof one of the exit light rays is greater than the critical angle, and the angle between the side surface and the bottom surface of the first refractive unitof the first optical path regulation layeris greater than 90 degrees. Therefore, the exit light of the sub-pixel will be totally reflected when being incident onto the side surface of the first refractive unitof the first optical path regulation layer. Thus, the exit angle θof the exit light becomes larger, resulting in the diverging effect of the exit light, which can slow down the luminance decay of a certain monochromatic light at full viewing angle. The incident angle θof another exit light ray is also greater than the critical angle, and the angle between the side surface and the bottom surface of the first refractive unitof the second light path regulation layeris less than 90 degrees. Therefore, the exit light of the sub-pixel will be totally reflected when being incident onto the side surface of the first refractive unitof the first light path regulation layer. Thus, the exit angle θof the exit light is reduced, resulting in the converging effect of the exit light, which can accelerate the luminance decay of a certain monochromatic light at a small viewing angle.

17 FIG. 16 FIG. 11 FIG. 11 FIG. 42 42 42 As shown in, the difference fromis that the second light path regulation layeradopts the structure of the second light path regulation layershown in. The structure of the second light path regulation layerinhas been described in detail above, so it will not be repeated.

1 401 41 401 41 2 3 401 42 401 42 401 41 4 The incident angle θof one of the exit light rays is greater than the critical angle, and the angle between the side surface and the bottom surface of the first refractive unitof the first optical path regulation layeris greater than 90 degrees. Therefore, the exit light of the sub-pixel will be totally reflected when being incident onto the side surface of the first refractive unitof the first optical path regulation layer. Thus, the exit angle θof the exit light becomes larger, and the diverging effect of the exit light is produced, which can slow down the luminance decay of a certain monochromatic light at full viewing angle. The incident angle θof another exit light ray is less than the critical angle, the angle between the side surface and the bottom surface of the first refractive unitof the second optical path regulation layeris greater than 90 degrees, and the angle between the exit light and the normal line of the side surface of the first refractive unitof the second optical path regulation layeris less than 40 degrees. Therefore, the exit light of the sub-pixel will be refracted when being incident onto the side surface of the first refractive unitof the first optical path regulation layer. Thus, the exit angle θof the exit light is reduced, and the converging effect of the exit light is produced, which can accelerate the luminance decay of a certain monochromatic light at a small viewing angle.

18 FIG. 41 41 41 42 In, the solid line is the curve of luminance variation with viewing angle when the optical path regulation layer is not provided. The dotted line is the curve of luminance variation with viewing angle when the first optical path regulation layeris arranged. The first optical path regulation layercan slow down the luminance decay of a certain monochromatic light at full viewing angle. The dotted line is the curve of luminance variation with viewing angle when the first optical path regulation layerand the second optical path regulation layerare both arranged. It can be seen that the luminance decay at a large viewing angle is indeed slowed down.

41 42 It can be understood that the first optical path regulation layercan slow down the luminance decay of a certain monochromatic light at full viewing angle, and the second optical path regulation layercan speed up the luminance decay of a certain monochromatic light at a small viewing angle. After the accelerated luminance decay of a certain monochromatic light at a small viewing angle is offset by the slowed luminance decay at full viewing angle, the slowed luminance decay of the certain monochromatic light at a large viewing angle can be achieved.

19 FIG. 6 FIG. 6 FIG. 13 FIG. 13 FIG. 41 42 41 50 10 41 41 41 42 50 10 42 42 42 As shown in, the optical path regulation layer may include a first optical path regulation layerand a second optical path regulation layer. The first optical path regulation layeris arranged on the side of the color filter layerclose to the driving backplane. The first optical path regulation layeradopts the structure of the first optical path regulation layershown in. The structure of the first optical path regulation layerinhas been described in detail before, so it will not be repeated. The second optical path regulation layeris arranged on the side of the color filter layeraway from the driving backplane. The second optical path regulation layeradopts the structure of the second optical path regulation layershown in. The structure of the second optical path regulation layerinhas been described in detail before, so it will not be repeated.

401 41 1 401 41 2 401 42 3 401 41 4 The angle between the side surface and the bottom surface of the first refractive unitof the first optical path regulation layeris larger than 90 degrees, and the incident angle θof one of the exit light rays is greater than the critical angle. Thus, the exit light of the sub-pixel will be totally reflected when being incident onto the side surface of the first refractive unitof the first optical path regulation layer, so that the exit angle θof the exit light becomes smaller, and the converging effect of the exit light is produced. This can accelerate the luminance decay of a certain monochromatic light at full viewing angle. The angle between the side surface and the bottom surface of the first refractive unitof the second optical path regulation layeris greater than 90 degrees, and the incident angle θof another exit light ray is also greater than the critical angle. Thus, the exit light of the sub-pixel will be totally reflected when being incident onto the side surface of the first refractive unitof the first optical path regulation layer, so that the exit angle θof the exit light becomes larger, and the diverging effect of the exit light is produced. This can slow down the luminance decay of a certain monochromatic light at a small viewing angle.

20 FIG. 19 FIG. 14 FIG. 14 FIG. 42 42 42 As shown in, the difference fromis that the second optical path regulation layeradopts the structure of the second optical path regulation layershown in. The structure of the second optical path regulation layerinhas been described in detail above, so it will not be described again.

401 41 1 41 401 41 2 401 42 3 42 401 41 4 The angle between the side surface and the bottom surface of the first refractive unitof the first optical path regulation layeris larger than 90 degrees, and the incident angle θof the exit light incident on the first optical path regulation layeris greater than the critical angle. Therefore, the exit light of the sub-pixel will be totally reflected when being incident onto the side surface of the first refractive unitof the first optical path regulation layer, so that the exit angle θof the exit light becomes smaller, resulting in the converging effect of the exit light, which can accelerate the luminance decay of a certain monochromatic light at full viewing angle. The angle between the exit light and the normal line of the side surface of the first refractive unitof the second optical path regulation layeris less than 40 degrees, and the incident angle θof the exit light incident on the second optical path regulation layeris less than the critical angle. Therefore, the exit light of the sub-pixel will be refracted when being incident onto the side surface of the first refractive unitof the first optical path regulation layer, so that the exit angle θof the exit light is reduced, resulting in the diverging effect of the exit light, which can slow down the luminance decay of a certain monochromatic light at a small viewing angle.

21 FIG. 41 41 41 42 In, the solid line is the curve of luminance variation with viewing angle when the optical path regulation layer is not provided. The dotted line is the curve of luminance variation with viewing angle when the first optical path regulation layeris arranged. The first optical path regulation layercan slow down the luminance decay of a certain monochromatic light at full viewing angle. The dotted line is the curve of luminance variation with viewing angle when the first optical path regulation layerand the second optical path regulation layerare both arranged. It can be seen that the luminance decay at a large viewing angle is indeed accelerated.

41 42 It can be understood that the first optical path regulation layercan accelerate the luminance decay of a certain monochromatic light at full viewing angle, and the second optical path regulation layercan slow down the luminance decay of a certain monochromatic light at a small viewing angle. After the slowed luminance decay of a certain monochromatic light at a small viewing angle is offset by the accelerated luminance decay at the full viewing angle, the accelerated luminance decay of a certain monochromatic light at a large viewing angle can be achieved.

The display panel provided by the embodiments of the present disclosure is further described below in conjunction with specific application scenarios.

22 FIG. 202 2024 2025 2026 51 511 512 513 As shown in, the sub-pixelusually includes a red sub-pixel, a green sub-pixel, and a blue sub-pixel, and the filter unitusually includes a red filter unit, a green filter unit, and a blue filter unit. The problem of color deviation of the color deviation trajectory at white light viewing angle toward a single large viewing angle, for example, the display panel becoming severely blue at the large viewing angle, results in a large color deviation value of the displayed image.

19 FIG. 20 FIG. 41 513 10 42 513 10 41 42 The optical path regulation structure shown inormay be introduced for the blue sub-pixel. Specifically, a first optical path regulation layeris provided on the side of the blue filter unitclose to the driving backplane, and a second optical path regulation layeris provided on the side of the blue filter unitclose to the driving backplane. The first optical path regulation layercan accelerate the luminance decay of the blue light at full viewing angle. The second optical path regulation layercan slow down the luminance decay of the blue light at a small viewing angle. Thus, after the slowed luminance decay of the blue light at a small viewing angle is offset by the accelerated luminance decay at full viewing angle, the luminance decay of the blue light at a large viewing angle can be accelerated.

23 FIG. 22 FIG. 24 FIG. 22 FIG. 23 FIG. 24 FIG. 41 41 42 is a CIE trajectory diagram at the white light viewing angle of the display panel in, andis a schematic diagram of the color deviation at different viewing angles of the display panel in. It can be seen fromandthat when only the first optical path regulation layeris provided, the luminance decay of the blue light at full viewing angle is accelerated. Although the blueing effect at a large viewing angle is significantly improved and the color deviation value is reduced, the yellowing phenomenon still occurs at a small viewing angle(<25°), resulting in an increase in the color deviation value. When the first optical path regulation layerand the second optical path regulation layerare introduced at the same time, the luminance decay of blue light at a large viewing angle is accelerated. While improving the blueing color deviation of white light at a large viewing angle, it will not cause the yellowing color deviation at a small viewing angle. While reducing the color deviation value of white light at a large viewing angle, it will not cause the deterioration of the color deviation value at a small viewing angle.

25 FIG. 13 FIG. 14 FIG. 16 FIG. 17 FIG. 42 511 10 42 41 42 513 41 42 The color deviation problem of the color deviation trajectory at white light viewing angle with an inflection point, such as blueing at a small viewing angle and yellowing at a large viewing angle, both being serious, results in large color deviation values at small and large viewing angles. As shown in, RGB is differentiated by introducing an optical path regulation layer. The second optical path regulation layershown inoris arranged on the side of the red filter unitclose to the driving backplane. The second optical path regulation layercan slow down the luminance decay of red light at a small viewing angle. The first optical path regulation layerand the second optical path regulation layershown inandare arranged on both sides of the blue filter unit. The first optical path regulation layercan slow down the luminance decay of the blue light at full viewing angle. The second optical path regulation layercan accelerate the luminance decay of the blue light at a small viewing angle. Thus, after the accelerated luminance decay of the blue light at a small viewing angle is offset by the slowed luminance decay at full viewing angle, the luminance decay of the blue light at a large viewing angle can be slowed down.

26 FIG. 25 FIG. 27 FIG. 26 FIG. 26 FIG. 27 FIG. is a CIE trajectory diagram at the white light viewing angle of the display panel in, andis a schematic diagram of the color deviation at different viewing angles of the display panel in. After introducing differentiated double-layer optical path regulation layers for sub-pixels of different colors, it can be seen fromthat the degree of blueing of the white light at a small viewing angle and yellowing at a large viewing angle are both reduced. It can be seen fromthat the color deviation values of the white light at large and small viewing angles are reduced, thereby improving the color deviation of the white light at small and large viewing angles at the same time.

20 10 10 20 When the OLED display panel displays an image, it is generally achieved by applying driving signals of different sizes to the pixel layerby the driving backplane. The driving backplaneand the pixel layerconstitute a display substrate. The structure of the display substrate according to an embodiment of the present disclosure is described in detail below.

28 FIG. 10 20 10 11 13 14 13 11 14 13 11 20 14 11 12 12 11 13 As shown in, the display substrate generally may include a driving backplaneand a pixel layer. The driving backplaneincludes a base substrate, a driving circuit layer, and a planarization layer group. The driving circuit layeris arranged on one side of the base substrate. The planarization layer groupis arranged on the side of the driving circuit layeraway from the base substrate. The pixel layeris arranged on the side of the planarization layer groupaway from the base substrate. In addition, the display substrate may also include a first buffer layer, and the first buffer layeris arranged between the base substrateand the driving circuit layer.

11 11 The base substratemay be a base substrate of inorganic material or organic material. For example, in an embodiment of the present disclosure, the material of the base substratemay be a glass material such as soda-lime glass, quartz glass, sapphire glass, or a metal material such as stainless steel, aluminum, nickel, etc.

11 11 11 11 In another embodiment of the present disclosure, the base substratemay also be a flexible substrate. For example, the material of the base substratemay be polyimide (PI). The base substratemay also be a composite of multiple layers of materials. For example, in an embodiment of the present disclosure, the base substratemay include a bottom film layer, a pressure-sensitive adhesive layer, a first polyimide layer, and a second polyimide layer stacked in sequence.

13 13 13 131 132 133 In the present disclosure, the driving circuit layeris provided with a driving circuit for driving sub-pixels. In the driving circuit layer, any driving circuit may include a transistor and a storage capacitor. Further, the transistor may be a thin film transistor. The thin film transistor may be selected from a top gate thin film transistor, a bottom gate thin film transistor, or a dual gate thin film transistor. The top gate thin film transistor is taken as an example, where the driving circuit layermay include an active layer, a gate insulation layer, a gate, and a first source-drain metal layer.

131 11 201 131 131 The active layeris arranged on one side of the base substrateand is located in the display area. The material of the active layermay be an amorphous silicon semiconductor material, a low temperature polycrystalline silicon semiconductor material, a metal oxide semiconductor material, an organic semiconductor material, or other types of semiconductor materials. Therefore, the thin film transistor may be an N-type thin film transistor or a P-type thin film transistor. The active layermay include a channel region and two doping regions of different doping types located on both sides of the channel region.

132 131 11 132 The gate insulation layermay cover the active layerand the base substrate. The material of the gate insulation layeris an insulation material such as silicon oxide.

133 201 133 132 11 131 133 11 131 11 133 11 131 11 The gateis arranged in the display area. The gateis arranged on the side of the gate insulation layeraway from the base substrate, and is directly facing the active layer. That is, the projection of the gateon the base substrateis located within the projection range of the active layeron the base substrate. For example, the projection of the gateon the base substratecoincides with the projection of the channel region of the active layeron the base substrate.

13 134 133 132 13 135 134 11 134 135 134 135 The driving circuit layeralso includes an interlayer insulation layer, which covers the gateand the gate insulation layer. The driving circuit layeralso includes an interlayer dielectric layer, which is arranged on the side of the interlayer insulation layeraway from the base substrate. The interlayer insulation layerand the interlayer dielectric layerare both insulation materials, but the materials of the interlayer insulation layerand the interlayer dielectric layermay be different.

135 11 1361 1362 1361 1362 201 131 1361 1362 131 The first source-drain metal layer is arranged on the surface of the interlayer dielectric layeraway from the base substrate. The first source-drain metal layer includes a first sourceand a drain. The first sourceand the drainare arranged in the display areaand connected to the active layer. For example, the first sourceand the drainare respectively connected to the two doping regions of the corresponding active layerthrough via holes.

137 11 137 14 11 14 137 11 14 137 14 11 A protective layeris arranged on the side of the first source-drain metal layer away from the base substrate, and the protective layercovers the first source-drain metal layer. A planarization layer groupis arranged on the side of the first source-drain metal layer away from the base substrate. The planarization layer groupis arranged on the side of the protective layeraway from the base substrate. The planarization layer groupcovers the protective layer. The surface of the planarization layer groupaway from the base substrateis a plane.

14 241 241 137 242 11 242 241 11 1381 1381 1361 Specifically, the planarization layer groupmay include a first planarization layer, and the first planarization layercovers the protective layer. The display substrate may also include a second source-drain metal layer. A second planarization layeris provided on the side of the second source-drain metal layer away from the base substrate. The second planarization layercovers the second source-drain metal layer and the side of the first planarization layeraway from the base substrate. The second source-drain metal layer includes a second source electrode, and the second source electrodeis connected to the first source electrodethrough a via hole.

20 14 11 20 201 202 201 2011 202 2011 202 10 11 202 14 11 202 A pixel layermay be provided on the side of the planarization layer groupaway from the base substrate. The pixel layerincludes a pixel definition layerand a plurality of sub-pixels. The pixel definition layerhas a plurality of pixel openings. The plurality of sub-pixelsis respectively provided in the plurality of pixel openings. The plurality of sub-pixelsis arrayed and distributed on the side of the driving backplaneaway from the base substrate. The specific sub-pixelsmay be located on the side of the planarization layer groupaway from the base substrate. It should be noted that the sub-pixelsmay include red sub-pixels, green sub-pixels, and blue sub-pixels according to different emitting colors.

20 2021 2022 2023 2021 10 11 2022 2021 11 2023 2022 11 The pixel layermay include a plurality of pixel electrodes, a light-emitting layer, and a common electrode. The pixel electrodeis located on the surface of the driving backplaneaway from the base substrate. The light-emitting layeris located on the surface of the pixel electrodeaway from the base substrate. The common electrodeis located on the surface of the light-emitting layeraway from the base substrate.

2021 1361 1381 13 1361 241 2021 1361 241 201 161 241 13 242 2021 1381 242 201 242 The pixel electrodeis connected to the first sourceor the second source. When the driving circuit layerincludes only the first sourceand the first planarization layer, the pixel electrodeis connected to the first sourcethrough the via hole on the first planarization layer, and the pixel definition layeris arranged to cover the first electrodeand the first planarization layer. When the driving circuit layeralso includes a second source-drain metal layer and a second planarization layer, the pixel electrodeis connected to the second sourcethrough the via hole on the second planarization layer, and the pixel definition layeris arranged to cover the second source-drain metal layer and the second planarization layer.

2023 2021 2021 2023 2022 2021 2023 2022 2022 2021 2022 The common electrodemay be used as a cathode, the pixel electrodemay be used as an anode, the pixel electrodeis connected to the positive electrode of the power supply, and the common electrodeis connected to the negative electrode of the power supply. The light-emitting layermay be driven to emit light by applying a signal through the pixel electrodeand the common electrodeso as to display an image. The specific light-emitting principle is not described in detail here. The light-emitting layermay include an electroluminescent organic light-emitting material. For example, the light-emitting layermay include an auxiliary layer and a light-emitting material layer sequentially stacked on the pixel electrode. Generally, a pattern area is arranged on the mask plate, and an auxiliary layer for sub-pixels of different colors and a light-emitting layerfor sub-pixels of different colors are formed by evaporation and other processes.

30 20 11 20 30 30 In addition, the display substrate of the present disclosure may further include an encapsulation layer, which is arranged on the side of the pixel layeraway from the base substrate, so that the pixel layeris covered to prevent water and oxygen corrosion. The encapsulation layermay be a single-layer or multi-layer structure, and the material of the encapsulation layermay include organic or inorganic materials, which are not specifically limited here.

30 31 32 33 31 20 11 32 31 11 33 32 11 33 11 In an embodiment, the encapsulation layermay include a first inorganic encapsulation layer, an organic encapsulation layer, and a second inorganic encapsulation layer. The first inorganic encapsulation layeris arranged on the side of the pixel layeraway from the base substrate. The organic encapsulation layeris arranged on the side of the first inorganic encapsulation layeraway from the base substrate. The second inorganic encapsulation layeris arranged on the side of the organic encapsulation layeraway from the base substrate. The second touch part is usually arranged on the side of the second inorganic encapsulation layeraway from the base substrate.

An embodiment of the present disclosure provides a display device, which may include a display panel in any one of the above embodiments of the present disclosure. The specific structure of the display panel has been described in detail above, so it will not be repeated here.

It should be noted that, in addition to the display panel, the display device also includes other necessary components and parts. Taking the display as an example, the display device includes a housing, a circuit board, a power cord, etc. Those skilled in the art can make corresponding supplements according to the specific use requirements of the display device, which will not be repeated here.

The display device may be a traditional electronic device, such as a mobile phone, a computer, a television, and a camcorder, or may be an emerging wearable device, such as a virtual reality device and an augmented reality device, which are not listed here one by one.

29 FIG. 10 20 30 40 An embodiment of the present disclosure also provides a method for manufacturing the above-mentioned display panel. As shown in, the method includes steps S, S, S, and S.

10 Step S, providing a driving backplane.

20 Step S, forming a pixel layer on a side of the driving backplane, where the pixel layer includes a pixel definition layer and a plurality of sub-pixels, the pixel definition layer is provided with a plurality of pixel openings, and the plurality of sub-pixels is respectively provided in different pixel openings.

30 Step S, forming an encapsulation layer on the side of the pixel layer away from the driving backplane.

40 Step S, forming a first refractive layer on the side of the encapsulation layer away from the driving backplane, patterning the first refractive layer to form a plurality of first refractive units, and filling a second refractive layer respectively between two adjacent first refractive units to form a plurality of second refractive units, where the orthographic projection of the first refractive unit or the second refractive unit on the driving backplane covers the orthographic projection of at least one sub-pixel on the base substrate.

40 In step S, a first refractive layer is formed on the side of the encapsulation layer away from the driving backplane, and the first refractive layer is patterned to form a plurality of first refractive units.

It should be noted that the angle between the side surface and the bottom surface of the first refractive unit is greater than or less than 90 degrees.

When the first refractive layer is positive photoresist, patterning the first refractive layer to form the plurality of first refractive units includes: exposing and developing the area of the first refractive layer directly facing the sub-pixel, where the residue increases as the etching depth increases during the development and patterning process, so that the cross section of the first refractive unit is a positive trapezoid, that is, the angle between the side surface and the bottom surface of the first refractive unit is less than 90 degrees.

When the first refractive layer is negative photoresist, patterning the first refractive layer to form the plurality of first refractive units includes: exposing and developing the area of the first refractive layer directly facing the pixel definition layer at the periphery of the sub-pixel, where as the etching depth increases during the development process, the loss of the film layer to be retained increases, resulting in the cross-section of the first refractive unit being an inverted trapezoid, that is, the angle between the side surface and the bottom surface of the first refractive unit is greater than 90 degrees.

40 In step S, the second refractive layer is filled respectively between two adjacent first refractive units to form the plurality of second refractive units.

The second refractive layer is deposited between two adjacent first refractive units by the way of inkjet printing.

The plurality of first refractive units and the plurality of second refractive units constitute the optical path regulation layer. The first refractive layer may be a touch layer. According to the requirements for slowing down or accelerating the luminance decay, the material of the first refractive layer is selected to be positive photoresist or negative photoresist. The second passivation layer, the first passivation layer, and the second buffer layer located between two adjacent touch groups are photoetched in a corresponding way to form the first refractive unit.

66 The width of the touch group located on the touch layer is usually 3 microns. Considering the accuracy of the etching process, the width of the first refractive unit is usually greater than or equal to 7 microns. Specifically, the distance between the edge of the orthographic projection of the touch groupon the driving backplane and the edge of the orthographic projection of the first refractive unit on the driving backplane is greater than 2 microns. The refraction effect of the first refractive unit can be ensured without affecting the touch function of the touch layer.

The spacing between adjacent sub-pixels is usually 18-23 microns. Thus, the side with a smaller width of the second refractive unit can be expanded by more than 10 microns than the light-emitting area of the sub-pixel. Generally, the center line of the sub-pixel is coinciding with the center line of the second refractive unit. Therefore, it is usually that the distance between the edge of the orthographic projection on the driving backplane of the side with a smaller width of the second refractive unit and the edge of the orthographic projection on the driving backplane of the side away from the driving backplane of the sub-pixel is greater than 5 microns. This effectively ensures that the exit light of the sub-pixel area is incident into the second refractive unit first.

After considering the specification and practicing the content disclosed herein, those skilled in the art will easily think of other embodiments of the present disclosure. The present application is intended to cover any variation, use or adaptation of the present disclosure, which follows the general principles of the present disclosure and includes common knowledge or customary technical means in the technical field that are not disclosed in the present disclosure. The description and examples are to be regarded as exemplary only, and the true scope and spirit of the present disclosure are indicated by the appended claims.